SPECIES.
1. 5: Campestris. Shell oval, very fragile; whorls three, not remarkably oblique, pale yellowish, with opaque white, and vitreous lines, irregularly alternating. Length not quite three-fifths ; breadth seven-twentieths of an inch.
Journ. Acad. Nat. Sciences, vol. i. p. 281.
This shell is extremely common in ma ny parts of the southern states; it abounds in the sea-islands of Georgia, in the low marshy grounds behind the sand hills of the coast, where they are destroyed in great numbers by the annual conflagra tion of the old grass; on Amelia island, East Florida, I found them in plenty on the highest sandy ground of the island. On Cumberland Island, in Mr. James Shaw's garden, I obtained several speci. mens from the leaves of radishes.
The resemblance between this species and the ovalis is very great; it differs, however, in being less elongated, and of a more robust form ; the revolution of the spire is much less oblique, the shell itself is thicker and less fragile.
Animal whitish; eyes, inferior tentacu la, and a line passing from the eyes, dis appearing under the shell, black ; a gam. boge coloured vitta is visible through that part of the shell which is opposed to the mouth.
2. S. Ovalis. Shell suboval, pale yel lowish, diaphanous, very thin and fragile, with nearly three oblique volutions. Bo dy very large. Spire small, but little prominent, somewhat obtuse. Aperture longitudinally subovate, large. Columel
la much narrowed, so as almost to permit the view of the interior apex from the base of the shell. Scarcely any calcare ous deposit on the pillar lip. Length nine-twentieths of an inch, aperture se ven-twentieths.
Inhabits marshy grounds in shaded si tuations. Common.
Jgurrt. Acad. at. Sciences, vol. i. p. 15.
Animal longer than its shell, furnished with foul/ tentacula, the two superior ones longer, cylindrical, supporting the eyes ; inferior ones, short, conic. Colour pale with minute Wick points, ,which are as sembled into fascia on the sides and fil lets on the neck above ; beck granulate above, a black line & side on the neck, the tip of the oculiferous ten. tacula, gradually disappearing under the shell. Front quadrate.
When the animal is living, so vitreous is the shell, that all the markings of its body are plainly discernible. So that al though the shell is of a straw-colour, im maculate, it appears of a dusky hue, with a remarkable white, flexuous, longitudi nal vitta on the back, arising from the stt ture, and terminated about mid way to the base, often with two or three obsolete white spots near its tip.
The characters of the inhabitants are widely distinct from the animal of the Lymnxa, and are somewhat allied to those of the inhabitants of the Helices.